Table 1. Crystallization conditions.

Method	Hanging-drop vapour diffusion
Plate type	24-well plates
Temperature (°C)	4
Protein concentration (mg ml−1)	20
Buffer composition of protein solution	20 mM Tris pH 7.5, 0.1 M NaCl
Composition of reservoir solution	0.1 M MES pH 5.5–6.5, 2.8 M ammonium sulfate
Volume and ratio of drop	2 µl:2 µl
Volume of reservoir (ml)	1